Pass isolate to ScopedPersistent constructor

Source/bindings/v8/V8MutationCallback.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 20 matching lines @@
 #include "bindings/v8/ScriptController.h"
 #include "bindings/v8/V8Binding.h"
 #include "bindings/v8/V8HiddenPropertyName.h"
 #include "core/dom/ScriptExecutionContext.h"
 #include "wtf/Assertions.h"
 
 namespace WebCore {
 
 V8MutationCallback::V8MutationCallback(v8::Handle<v8::Function> callback, ScriptExecutionContext* context, v8::Handle<v8::Object> owner, v8::Isolate* isolate)
     : ActiveDOMCallback(context)
-    , m_callback(callback)
+    , m_callback(isolate, callback)
     , m_world(DOMWrapperWorld::current())
     , m_isolate(isolate)
 {
     owner->SetHiddenValue(V8HiddenPropertyName::callback(), callback);
     m_callback.makeWeak(this, &makeWeakCallback);
 }
 
 void V8MutationCallback::call(const Vector<RefPtr<MutationRecord> >& mutations, MutationObserver* observer)
 {
     if (!canInvokeCallback())
@@ skipping 28 matching lines @@
     exceptionCatcher.SetVerbose(true);
     ScriptController::callFunctionWithInstrumentation(scriptExecutionContext(), callback, thisObject, 2, argv, m_isolate);
 }
 
 void V8MutationCallback::makeWeakCallback(v8::Isolate*, v8::Persistent<v8::Function>*, V8MutationCallback* callback)
 {
     callback->m_callback.clear();
 }
 
 } // namespace WebCore